In our exclusive clip from a behind-the-scenes interview with the executive producers of the Arrowverse, "Elseworlds" crossover, Batwoman EP Caroline Dries explains how the writers sowed the seeds for the possible spinoff series during the crossover episodes.

"Obviously Arkham is this quintessential element of Gotham and so it made sense as we were breaking the story, we have to go there… it made perfect sense also that havoc ensues and all of these criminals get lose and now Barry, Kara, and Oliver have to clean up the mess that they made," Dries says in the video above. "It was really fun planting these little Easter eggs, figuring out what we could do in the Batwoman series if a couple got loose, introducing, featuring a few of the criminals more specifically."

Fans will be able to see the entire interview in a special feature titled “Inside the Crossover: Elseworlds," which is available in its entirety with any digital season pass purchase of The Flash: Season 5, Supergirl: Season 4 or Arrow: Season 7, beginning Dec. 14.